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References: <20170626220330.6785-1-laurent@vivier.eu>
	<20170626220330.6785-6-laurent@vivier.eu>
From: Richard Henderson <rth@twiddle.net>
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Date: Mon, 26 Jun 2017 15:57:54 -0700
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Subject: Re: [Qemu-devel] [PATCH v2 5/7] target/m68k: add fsglmul and fsgldiv
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To: Laurent Vivier <laurent@vivier.eu>, qemu-devel@nongnu.org
Cc: Aurelien Jarno <aurelien@aurel32.net>, =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= <f4bug@amsat.org>

On 06/26/2017 03:03 PM, Laurent Vivier wrote:
> +void HELPER(fsglmul)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
> +{
> +    floatx80 a, b;
> +
> +    PREC_BEGIN(32);
> +    a = floatx80_round(val0->d, &env->fp_status);
> +    b = floatx80_round(val1->d, &env->fp_status);
> +    res->d = floatx80_mul(a, b, &env->fp_status);
> +    PREC_END();
> +}
> +

You need to set the rounding mode to truncate for the first two operations.


r~